COBOL/400 Subfile Programming (Audio Training)

Course Description:
COBOL/400 Subfile Programming is a self-paced, audiocassette course providing comprehensive, practical training in the design and coding of subfile programs.

Time required: Approximately 15 hours

When you have completed of this course, you will be able to:
   • Use screen design aid (SDA) to create and maintain display files that contain subfiles
   • Create COBOL subfile programs that allow users to scroll through selected data file records
   • Create COBOL subfile programs that allow users to fold and truncate records
   • Create COBOL programs that allow data entry into subfile records, the DUP key, file updates
   • Create COBOL subfile programs that edit and verify user-entered data
   • Create COBOL programs that sort, initialize, clear, and delete subfiles
   • Create COBOL programs that use more than one subfile
   • Create and use message subfiles that handle multiple messages
   • Use techniques to improve subfile program performance
   • Use variable-length subfiles

Audience: COBOL Programmers

Prerequisites: AS/400 workstation operations AS/400 system operations COBOL/400 programming Interactive COBOL/400 Programming

Course Outline:
   Subfile Concepts
     Subfile Record Format (SFLRCD)
     Subfile Control Format (SFLCTL)
     Subfile Size (SFLSIZ)
     Subfile Page Size (SFLPAG)
   Screen Design Aid (SDA)
   Managing Subfile Data
     Reading Subfile Records
     Writing Subfile Records
     Managing Subfile Relative Record Numbers
   Managing Subfile Data
     Displaying a Subfile
     Initializing a Subfile
     Clearing a Subfile
     Deleting a Subfile
     Handling Multiple Subfiles
   Scrolling Subfile Records
     Using OS/400 Controlled Scrolling
     Subfile End (SFLEND) Keyword
     “Page Wise” Scrolling
     Subfile Record Number (SFLRCDNBR) Keyword
   Subfile Applications
     “Alpha Search” Inquiry
     Variable Length Subfile Records
     Fold/Truncate Functions
     Data Entry Subfiles
     Validity Checking
     Online Batch Totals
     File Maintenance Subfiles
     Updating Subfile Records
     Deleting Subfile Records
   Message Subfiles
     Subfile Program Queue (SFLPGMQ)
     Subfile Message Record (SFLMSGRCD)
     Selecting Messages for Display
     Subfile Message Key (SFLMSGKEY)
   Subfile Techniques
     DUP Key Programming
     Sorting Subfile Records
     Removing Blank Subfile Records
   ANSI ‘85 Standards
   IBM COBOL/400 Extensions

Course Details:

Level:	Intermediate
Subject:	Programming--COBOL
Length:	15 hrs.
Materials:	Eight audiocassettes; Student text; Workbook; Interactive media
Publisher:	ATS
Publish Date:	June 1998